Lightning Impulse Voltage Breakdown Characteristics of Vacuum Interrupters with Contact Gaps 10 to 50 mm
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Lightning Impulse Voltage Breakdown Characteristics of Vacuum Interrupters with Contact Gaps 10 to 50 mm
- 发表刊物：
- XXIVth ISDEIV 2010
- 摘要：
- The objective of this paper is to understand the standard lightning impulse voltage breakdown
characteristics of vacuum interrupters with contact gaps 10 to 50 mm and how contact parameters
influence the breakdown characteristics. The investigated contact parameters include contact
diameter 75 and 60 mm, contact surface roughness 1.6 and 3.2 μm, and contact radius of
curvature 6 and 2 mm. Therefore we designed four high-voltage vacuum interrupters in the
experiments. The vacuum interrupters were put into a porcelain envelope with SF6 gas as an
external insulation of the vacuum interrupters. The contact gaps can be adjusted manually up to 50
mm. Positive polarity lightning impulse voltage (1.2/50 s) was applied by an up-and-down method.
Experimental results revealed the breakdown probability distributions followed Weibull
distributions when the breakdown voltage saturated within the investigated contact gaps 10 to 50
mm. Within the contact gaps 10 to 50 mm, U50 of vacuum interrupter with contact radius of
curvature 2 mm was higher than that of vacuum interrupter with contact radius of curvature 6 mm.
And U50 of contact roughness 1.6 μm was close to that of contact roughness 3.2 μm. U50 of the
contact diameter 60 mm was close to that of contact diameter 75 mm. And 50% breakdown voltage
U50 depended on the contact gap d (10-50 mm) for four interrupters, can be expressed by an
equation U50=kd, where is a power exponent; k denotes a coefficient which can be determined by
experiments. And under our experimental condition, power lay in a range of 0.6-0.7 for the four
vacuum interrupters. The breakdown phenomenon could be due to the micro-particles.
- 合写作者：
- Zhang,Liu,Geng,Yang,Wang
- 卷号：
- 09.2010
- 页面范围：
- 44-47
- 是否译文：
- 否
- 发表时间：
- 2010-09-01